101
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Zhou J, Jiang B, Fujihira Y, Zhao Z, Imai T, Shibata N. Catalyst-free carbosilylation of alkenes using silyl boronates and organic fluorides via selective C-F bond activation. Nat Commun 2021; 12:3749. [PMID: 34145264 PMCID: PMC8213744 DOI: 10.1038/s41467-021-24031-w] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 06/01/2021] [Indexed: 02/05/2023] Open
Abstract
A regioselective carbosilylation of alkenes has emerged as a powerful strategy to access molecules with functionalized silylated alkanes, by incorporating silyl and carbon groups across an alkene double bond. However, to the best of our knowledge, organic fluorides have never been used in this protocol. Here we disclose the catalyst-free carbosilylation of alkenes using silyl boronates and organic fluorides mediated by tBuOK. The main feature of this transformation is the selective activation of the C-F bond of an organic fluoride by the silyl boronate without undergoing potential side-reactions involving C-O, C-Cl, heteroaryl-CH, and even CF3 groups. Various silylated alkanes with tertiary or quaternary carbon centers that have aromatic, hetero-aromatic, and/or aliphatic groups at the β-position are synthesized in a single step from substituted or non-substituted aryl alkenes. An intramolecular variant of this carbosilylation is also achieved via the reaction of a fluoroarene with a ω-alkenyl side chain and a silyl boronate.
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Affiliation(s)
- Jun Zhou
- Department of Nanopharmaceutical Sciences, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, Japan
| | - Bingyao Jiang
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, Japan
| | - Yamato Fujihira
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, Japan
| | - Zhengyu Zhao
- Department of Nanopharmaceutical Sciences, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, Japan
| | - Takanori Imai
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, Japan
| | - Norio Shibata
- Department of Nanopharmaceutical Sciences, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, Japan.
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, Japan.
- Institute of Advanced Fluorine-Containing Materials, Zhejiang Normal University, Jinhua, China.
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102
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Chen P, Wang ZY, Peng XS, Wong HNC. Stereospecific Iron-Catalyzed Carbon (sp 2)-Carbon (sp 2) Cross-Coupling of Aryllithium with Vinyl Halides. Org Lett 2021; 23:4385-4390. [PMID: 34008404 DOI: 10.1021/acs.orglett.1c01318] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We present herein an efficient synthetic protocol involving iron-catalyzed cross-coupling of organolithium compounds with vinyl halides as key coupling partners. More than 30 examples were obtained with moderate to good yields and high stereoselectivities. The practicality of this method is evidenced by a gram-scale synthesis. In addition, a preliminary mechanistic investigation was also performed.
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Affiliation(s)
- Peng Chen
- Department of Chemistry, and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China
| | - Zhi-Yong Wang
- Department of Chemistry, and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China
| | - Xiao-Shui Peng
- Department of Chemistry, and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China.,School of Science and Engineering, The Chinese University of Hong Kong (Shenzhen), Longgang District, Shenzhen 518172, China
| | - Henry N C Wong
- Department of Chemistry, and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China.,School of Science and Engineering, The Chinese University of Hong Kong (Shenzhen), Longgang District, Shenzhen 518172, China
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103
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Facile Synthesis and Characterization of Palladium@Carbon Catalyst for the Suzuki-Miyaura and Mizoroki-Heck Coupling Reactions. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11114822] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Palladium-based carbon catalysts (Pd/C) can be potentially applied as an efficient catalyst for Suzuki–Miyaura and Mizoroki–Heck coupling reactions. Herein, a variety of catalysts of palladium on activated carbon were prepared by varying the content of ‘Pd’ via an in situ reduction method, using hydrogen as a reducing agent. The as-prepared catalysts (0.5 wt % Pd/C, 1 wt % Pd/C, 2 wt % Pd/C and 3 wt % Pd/C) were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and Brunauer–Emmett–Teller (BET) analyses. The catalysts were tested as a coupling catalyst for Suzuki–Miyaura coupling reactions involving aryl halides and phenyl boronic acid. The optimization of the catalyst by varying the palladium content on the activated carbon yielded Pd/C catalysts with very high catalytic activity for Suzuki reactions of aryl halides and a Mizoroki–Heck cross-coupling reaction of 4-bromoanisol and acrylic acid in an aqueous medium. A high ‘Pd’ content and uniform ‘Pd’ impregnation significantly affected the activity of the catalysts. The catalytic activity of 3% Pd/C was found to make it a more efficient catalyst when compared with the other synthesized Pd/C catalysts. Furthermore, the catalyst reusability was also tested for Suzuki reactions by repeatedly performing the same reaction using the recovered catalyst. The 3% Pd/C catalyst displayed better reusability even after several reactions.
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104
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Zhao M, Wang Y, Wang ZL, Xu JL, Dai KY, Xu YH. Copper-Catalyzed Chemoselective Silylative Cyclization of 2,2'-Diethynylbiaryl Derivatives. Org Lett 2021; 23:3859-3863. [PMID: 33970651 DOI: 10.1021/acs.orglett.1c00968] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In this protocol, copper-catalyzed diverse silylative carbocyclization reactions of 2,2'-diethynylbiaryl derivatives with silaboronate were reported. Three new and novel types of domino reactions for the copper-catalyzed transformation of silaboronate were discovered. The corresponding cyclobuta[l]phenanthrene, bis((silyl)methyl)phenanthrene, and silyl-substituted exocyclic diene products were chemoselectively formed with high efficiency.
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Affiliation(s)
- Meng Zhao
- Hefei National Laboratory for Physical Sciences at the Microscale, and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Ying Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Zi-Lu Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Jian-Lin Xu
- Hefei National Laboratory for Physical Sciences at the Microscale, and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Kai-Yang Dai
- Hefei National Laboratory for Physical Sciences at the Microscale, and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Yun-He Xu
- Hefei National Laboratory for Physical Sciences at the Microscale, and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.,State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China
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105
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Chowdhury R, Dubey AK, Ghosh SK. Organocatalytic Enantioselective Michael Addition of Pyrazol‐5‐ones to β‐Silylmethylene Malonates: Synthesis of Chiral Organosilanes Under Metal‐ free Conditions. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100120] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Raghunath Chowdhury
- Bio-Organic Division Bhabha Atomic Research Centre, Trombay Mumbai 400085 India
- Homi Bhabha National Institute Bhabha Atomic Research Centre, Trombay Mumbai 400085 India
| | - Akhil K. Dubey
- Bio-Organic Division Bhabha Atomic Research Centre, Trombay Mumbai 400085 India
| | - Sunil K. Ghosh
- Homi Bhabha National Institute Bhabha Atomic Research Centre, Trombay Mumbai 400085 India
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106
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Zhu MH, Zhang XW, Usman M, Cong H, Liu WB. Palladium-Catalyzed (4 + 4) Annulation of Silacyclobutanes and 2-Iodobiarenes to Eight-Membered Silacycles via C–H and C–Si Bond Activation. ACS Catal 2021. [DOI: 10.1021/acscatal.1c00975] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Ming-Hui Zhu
- Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), Sauvage Center for Molecular Sciences, College of Chemistry and Molecular Sciences, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072, China
| | - Xiao-Wen Zhang
- Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), Sauvage Center for Molecular Sciences, College of Chemistry and Molecular Sciences, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072, China
| | - Muhammad Usman
- Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), Sauvage Center for Molecular Sciences, College of Chemistry and Molecular Sciences, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072, China
| | - Hengjiang Cong
- Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), Sauvage Center for Molecular Sciences, College of Chemistry and Molecular Sciences, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072, China
| | - Wen-Bo Liu
- Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), Sauvage Center for Molecular Sciences, College of Chemistry and Molecular Sciences, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072, China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
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107
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Wu XX, Ye H, Jiang G, Hu L. Domino Heck/Hiyama cross-coupling: trapping of the σ-alkylpalladium intermediate with arylsilanes. Org Biomol Chem 2021; 19:4254-4257. [PMID: 33890598 DOI: 10.1039/d1ob00595b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A palladium-catalyzed domino Heck cyclization/Hiyama coupling reaction by the trapping of the σ-alkylpalladium intermediate with arylsilanes is described. A wide range of aryl-tethered alkenes and arylsilanes are all compatible with the reaction conditions. This approach shows good yields and excellent functional group tolerance, presenting a more practical and sustainable alternative to the conventional domino Heck cyclization/Suzuki coupling reaction.
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Affiliation(s)
- Xin-Xing Wu
- College of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, People's Republic of China.
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108
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Lin T, Qian P, Wang YE, Ou M, Jiang L, Zhu C, Xu Y, Xiong D, Mao J. Palladium-Catalyzed Direct Arylation of 2-Pyridylmethyl Silanes with Aryl Bromides. Org Lett 2021; 23:3000-3003. [PMID: 33779175 DOI: 10.1021/acs.orglett.1c00677] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The first palladium-catalyzed direct arylation of 2-pyridylmethyl silanes with aryl bromides to generate a diverse array of aryl(2-pyridyl)-methyl silane derivatives has been developed. This protocol facilitates access to various kinds of heterocycle-containing silanes in good to excellent yields (40 examples, 66-97% yield) with good functional group tolerance. The scalability of this transformation is demonstrated.
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Affiliation(s)
- Tingzhi Lin
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211800, P. R. China
| | - Pengcheng Qian
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211800, P. R. China
| | - Yan-En Wang
- College of Science, Hebei Agricultural University, Baoding 071000, P. R. China
| | - Mingjie Ou
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211800, P. R. China
| | - Long Jiang
- Institute of Advanced Synthesis (IAS), Northwestern Polytechnical University (NPU), Xi'an 710072, China.,Yangtze River Delta Research Institute of NPU, Taicang, Jiangsu 215400, P. R. China
| | - Chen Zhu
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211800, P. R. China
| | - Yuchuan Xu
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211800, P. R. China
| | - Dan Xiong
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211800, P. R. China
| | - Jianyou Mao
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211800, P. R. China
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109
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Chapp SM, Schley ND. Reversible C(sp 3)-Si Oxidative Addition of Unsupported Organosilanes: Effects of Silicon Substituents on Kinetics and Thermodynamics. J Am Chem Soc 2021; 143:5534-5539. [PMID: 33784087 DOI: 10.1021/jacs.1c01564] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The intermolecular oxidative addition of unactivated C(sp3)-Si bonds is reported for a family of organosilanes at a cationic pincer-supported iridium complex. To our knowledge, no examples of oxidative addition to give analogous unsupported (alkyl)metal silyl complexes have been previously reported. The generality of this transformation is excellent, with successful examples demonstrated for tetraorganosilanes, mono- and poly alkoxysilanes, and two siloxysilanes. Oxidative addition is found to be completely reversible, with the product of reductive elimination being subject to trapping by triethylsilane. The successful isolation of these metal silyl complexes has allowed for an in-depth kinetic analysis of C(sp3)-Si reductive elimination, a process with strong implications in both catalytic C-H silylation and olefin hydrosilylation. The apparent order of reactivity is SiMe3 > SiMe2(CF3) > SiMe2OSiMe3 > SiMe2OSiMe2OSiMe3 > SiMe2(OMe) > SiMe2(OEt) > SiMe(OMe)2. A DFT analysis of the oxidative addition products shows that the thermodynamic stability of the (alkyl)metal silyl complexes span a range of ca. 10 kcal·mol-1, which relate closely with the experimentally determined rates of C(sp3)-Si reductive elimination and trapping, though a clear kinetic distinction exists between methoxy- and siloxysilyl complexes.
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Affiliation(s)
- Scott M Chapp
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235 United States
| | - Nathan D Schley
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235 United States
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110
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Cohen Y, Augustin AU, Levy L, Jones PG, Werz DB, Marek I. Regio- and Diastereoselective Copper-Catalyzed Carbomagnesiation for the Synthesis of Penta- and Hexa-Substituted Cyclopropanes. Angew Chem Int Ed Engl 2021; 60:11804-11808. [PMID: 33742749 DOI: 10.1002/anie.202102509] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Indexed: 11/07/2022]
Abstract
Despite the highly strained nature of cyclopropanes possessing three vicinal quaternary carbon stereocenters, the regio- and diastereoselective copper-catalyzed carbomagnesiation reaction of cyclopropenes provides an easy and efficient access to these novel persubstituted cyclopropyl cores with a complete regio- and diastereoselectivity.
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Affiliation(s)
- Yair Cohen
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa, 3200009, Israel
| | - André U Augustin
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa, 3200009, Israel
| | - Laura Levy
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa, 3200009, Israel
| | - Peter G Jones
- Technische Universität Braunschweig, Institute of Inorganic and Analytical Chemistry, Hagenring 30, 38106, Braunschweig, Germany
| | - Daniel B Werz
- Technische Universität Braunschweig, Institute of Organic Chemistry, Hagenring 30, 38106, Braunschweig, Germany
| | - Ilan Marek
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa, 3200009, Israel
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111
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Cohen Y, Augustin AU, Levy L, Jones PG, Werz DB, Marek I. Regio‐ and Diastereoselective Copper‐Catalyzed Carbomagnesiation for the Synthesis of Penta‐ and Hexa‐Substituted Cyclopropanes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102509] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Yair Cohen
- Schulich Faculty of Chemistry Technion—Israel Institute of Technology Technion City Haifa 3200009 Israel
| | - André U. Augustin
- Schulich Faculty of Chemistry Technion—Israel Institute of Technology Technion City Haifa 3200009 Israel
| | - Laura Levy
- Schulich Faculty of Chemistry Technion—Israel Institute of Technology Technion City Haifa 3200009 Israel
| | - Peter G. Jones
- Technische Universität Braunschweig Institute of Inorganic and Analytical Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Daniel B. Werz
- Technische Universität Braunschweig Institute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Ilan Marek
- Schulich Faculty of Chemistry Technion—Israel Institute of Technology Technion City Haifa 3200009 Israel
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112
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Louka A, Stratakis M. Synthesis of Vinylgermanes via the Au/TiO2-Catalyzed cis-1,2-Digermylation of Alkynes and the Regioselective Hydrogermylation of Allenes. Org Lett 2021; 23:3599-3603. [DOI: 10.1021/acs.orglett.1c00997] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anastasia Louka
- Department of Chemistry, University of Crete, Voutes 71003, Heraklion, Greece
| | - Manolis Stratakis
- Department of Chemistry, University of Crete, Voutes 71003, Heraklion, Greece
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113
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Wen J, Shi Z. From C4 to C7: Innovative Strategies for Site-Selective Functionalization of Indole C-H Bonds. Acc Chem Res 2021; 54:1723-1736. [PMID: 33709705 DOI: 10.1021/acs.accounts.0c00888] [Citation(s) in RCA: 103] [Impact Index Per Article: 34.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The widespread presence of hydrocarbons makes C-H functionalization an attractive alternative to traditional cross-coupling methods. As indole is an important heteroarene in a plethora of natural products and pharmaceuticals, C-H functionalization of indole moieties has emerged as one of the most important topics in this field. Due to the presence of multiple C-H bonds in indoles, site selectivity is a long-standing challenge. Much effort has been devoted to the C-H functionalization of indoles at the C3 or C2 position, while accessing the benzene core (from C4 to C7) is considerably more challenging.This Account summarizes our recent efforts toward site-selective C-H functionalization of indoles at the benzene core based on innovative strategies. A common method to solve the issue involves the development of directing groups (DGs). Our early studies establish that the installation of the N-P(O)tBu2 group at the N position can produce C7 and C6 arylation products using palladium and copper catalysts, respectively. The developed system can also be extended to direct arylation of indoles at the C5 and C4 positions by installing a pivaloyl group at the C3 position. Further investigation of indoles bearing N-PtBu2 groups shows a more diverse reactivity for C-H functionalizations at the C7 position, including arylation, olefination, acylation, alkylation, silylation, and carbonylation with different coupling partners. Compared to the P(V) DG, the P(III) group can be easily attached to the indole substrates and detached from the products. However, these attractive reactions rely mostly on precious metal catalysts with ligands; this requirement can be a significant limitation, particularly for large-scale syntheses and the necessity of removal of toxic trace metals in pharmaceutical products. We have also uncovered a general strategy for chelation-assisted aromatic C-H borylation just using simple BBr3 under mild conditions, in which the installation of pivaloyl groups at the N1 or C3 position of indoles can selectively deliver the boron species to the unfavorable C7 or C4 positions and allow subsequent C-H borylation without any metal. This transition-metal-free strategy can be extended to synthesize C7 and C4 hydroxylated indoles by boron-mediated directed C-H hydroxylation under mild reaction conditions and with broad functional group compatibility.In this Account, we describe our contributions to this topic since 2015. These studies provide efficient and attractive methods for the divergent synthesis of valuable substituted indoles and insights into the exploration of new strategies for the site-selective C-H functionalization and directives for other important heteroarenes.
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Affiliation(s)
- Jian Wen
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Zhuangzhi Shi
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
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114
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Liu XT, Zhang GL, Zeng JH, Hu J, Zhan ZP. Pd(acac) 2/Xantphos: A highly efficient and readily available catalyst for regioselective hydrosilylation of allenes. PHOSPHORUS SULFUR 2021. [DOI: 10.1080/10426507.2020.1845683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Xiao-Tao Liu
- Wanxiang Technology Co., Ltd., Huaian, Jiangsu, P.R. China
| | - Guo-Liang Zhang
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, P.R. China
| | - Jia-Hao Zeng
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, P.R. China
| | - Jing Hu
- Modern Educational Technology and Practice Training Center, Xiamen University, Xiamen, Fujian, P.R. China
| | - Zhuang-Ping Zhan
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, P.R. China
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115
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Ayogu JI, Onoabedje EA. Prospects and Applications of Palladium Nanoparticles in the Cross-coupling of (hetero)aryl Halides and Related Analogues. ChemistryOpen 2021; 10:430-450. [PMID: 33590728 PMCID: PMC8015734 DOI: 10.1002/open.202000309] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Indexed: 12/14/2022] Open
Abstract
Discovering efficient methods for the formation of carbon-carbon bonds is a central ongoing theme in organic synthesis. Cross-coupling reactions catalysed by metal nanoparticles are attractive alternatives to the traditional use of metal counterparts due to the catalytic tunability, selectivity, recyclability and reusability of the nanoparticles. The ongoing search for sustainable processes demands that reusable and environmentally benign catalysts are used. While the advantages of nanoparticles catalysts over bulk catalysts cannot be overemphasised, the problem of sintering, agglomeration and leaching are drawbacks to their full industrial applications. Hence, efforts are being made towards advancing the efficiency of the catalytic nanoparticle systems over the years. This review presents the progress, the challenges and the prospects of palladium nanoparticle with focus on Heck, Suzuki, Hiyama and Sonogashira cross-coupling reactions involving (hetero) aryl halides and the analogues.
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Affiliation(s)
- Jude I. Ayogu
- Department of Chemistry, School of Physical and Chemical ScienceUniversity of CanterburyChristchurch8040New Zealand
- Department of Pure and Industrial ChemistryUniversity of NigeriaNsukka410001Nigeria
| | - Efeturi A. Onoabedje
- Department of Pure and Industrial ChemistryUniversity of NigeriaNsukka410001Nigeria
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116
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Synergistic Ni/Cu catalyzed migratory arylsilylation of terminal olefins. Sci Bull (Beijing) 2021; 66:570-577. [PMID: 36654427 DOI: 10.1016/j.scib.2020.10.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 09/17/2020] [Accepted: 09/29/2020] [Indexed: 01/20/2023]
Abstract
Synthesis of organosilanes from alkenes is a very important topic owing to their wide applications. A Ni/Cu dual metal-catalyzed arylsilylation of terminal alkenes, featuring migratory selectivity, has been developed. A wide diversity of aliphatic silanes have been prepared from terminal alkenes, aryl halides and Suginome's reagent. This protocol is highlighted by excellent regioselectivity, mild reaction conditions and good functional group tolerance. In addition to benzylic positions, carbon-carbon bonds can also be constructed at allylic positions. Preliminary mechanistic studies suggest that the copper cocatalyst promotes the transmetalation of Suginome's reagent, and the addition of a PyrOx ligand inhibits the formation of side-products from the carbon-Heck pathway. Moreover, studies toward the nature of the PyrOx ligand revealed that the steric hindrance of the oxazoline moiety greatly affects the chain-walking process, but not the arylation step.
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117
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Guo Z, Wen H, Liu G, Huang Z. Iron-Catalyzed Regio- and Stereoselective Hydrosilylation of 1,3-Enynes To Access 1,3-Dienylsilanes. Org Lett 2021; 23:2375-2379. [PMID: 33689387 DOI: 10.1021/acs.orglett.1c00670] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A regio- and stereoselective hydrosilylation of 1,3-enynes with primary and secondary silanes to access 1,3-dienylsilanes is accomplished by employing an iron precatalyst bearing iminopyridine-oxazoline (IPO) ligand. The hydrosilylation proceeds via syn-addition of a Si-H bond to the alkyne group of 1,3-enynes, incorporating the silyl group at the site proximal to the alkene. The reaction features mild conditions, broad substrate scope, and good functional group tolerance. The synthetic utility was demonstrated by gram-scale reactions and further transformations.
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Affiliation(s)
- Zhihao Guo
- Chang-Kung Chuang Institute, East China Normal University, Shanghai 200062, China.,State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Huanan Wen
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Guixia Liu
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Zheng Huang
- Chang-Kung Chuang Institute, East China Normal University, Shanghai 200062, China.,State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China.,School of Chemistry and Material Sciences, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou 310024, China
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118
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Xu W, Guo D, Ebadi AG, Toughani M, Vessally E. Transition-metal catalyzed carboxylation of organoboron compounds with CO2. J CO2 UTIL 2021. [DOI: 10.1016/j.jcou.2020.101403] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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119
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Wan Y, Zhu J, Yuan Q, Wang W, Zhang Y. Synthesis of β-Silyl α-Amino Acids via Visible-Light-Mediated Hydrosilylation. Org Lett 2021; 23:1406-1410. [PMID: 33502205 DOI: 10.1021/acs.orglett.1c00065] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
An expedient synthesis of β-silyl α-amino acids is reported via the application of visible-light-mediated hydrosilylation. The reaction utilizes readily accessible and structurally diverse hydrosilanes to provide radicals for conjugate addition to dehydroalanine ester and analogues. Notably, the use of chiral methyleneoxazolidinone as the substrate and chiral inducer enabled the highly stereoselective synthesis. Furthermore, the reaction could also be performed in a continuous flow fashion and scaled up to the gram scale.
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Affiliation(s)
- Yi Wan
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Jiajie Zhu
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Qiyang Yuan
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Wei Wang
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, P. R. China.,Department of Pharmacology and Toxicology and BIO5 Institute, University of Arizona, Tucson, Arizona 85721-0207, United States
| | - Yongqiang Zhang
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, P. R. China
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120
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Roslan II, Zhang H, Ng K, Jaenicke S, Chuah G. A Visible Light and Iron‐mediated Carbocationic Route to Polysubstituted 1‐Halonaphthalenes by Benzannulation using Allylbenzenes and Polyhalomethanes. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001249] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Irwan Iskandar Roslan
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Fax
| | - Hongwei Zhang
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Fax
| | - Kian‐Hong Ng
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Fax
| | - Stephan Jaenicke
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Fax
| | - Gaik‐Khuan Chuah
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Fax
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121
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Sun X, Dong X, Liu H, Liu Y. Recent Progress in Palladium‐Catalyzed Radical Reactions. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001315] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Xi Sun
- School of Chemistry Chemical Engineering Shandong University of Technology 266 West Xincun Road Zibo 255049 People's Republic of China
| | - Xu Dong
- School of Chemistry Chemical Engineering Shandong University of Technology 266 West Xincun Road Zibo 255049 People's Republic of China
| | - Hui Liu
- School of Chemistry Chemical Engineering Shandong University of Technology 266 West Xincun Road Zibo 255049 People's Republic of China
| | - Yuying Liu
- School of Chemistry Chemical Engineering Shandong University of Technology 266 West Xincun Road Zibo 255049 People's Republic of China
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122
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Dethe DH, Beeralingappa NC, Das S, Nirpal AK. Ruthenium-catalyzed formal sp 3 C-H activation of allylsilanes/esters with olefins: efficient access to functionalized 1,3-dienes. Chem Sci 2021; 12:4367-4372. [PMID: 34163699 PMCID: PMC8179449 DOI: 10.1039/d0sc06845d] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Ru-catalysed oxidative coupling of allylsilanes and allyl esters with activated olefins has been developed via isomerization followed by C(allyl)-H activation providing efficient access to stereodefined 1,3-dienes in excellent yields. Mild reaction conditions, less expensive catalysts, and excellent regio- and diastereoselectivity ensure universality of the reaction. In addition, the unique power of this reaction was illustrated by performing the Diels-Alder reaction, and enantioselective synthesis of highly functionalized cyclohexenone and piperidine and finally synthetic utility was further demonstrated by the efficient synthesis of norpyrenophorin, an antifungal agent.
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Affiliation(s)
- Dattatraya H Dethe
- Department of Chemistry, Indian Institute of Technology Kanpur Kanpur 208016 India
| | | | - Saikat Das
- Department of Chemistry, Indian Institute of Technology Kanpur Kanpur 208016 India
| | - Appasaheb K Nirpal
- Department of Chemistry, Indian Institute of Technology Kanpur Kanpur 208016 India
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123
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Qiu C, Asgari P, Mao XJ, Jeon J, Schug KA. Gas chromatography-vacuum ultraviolet spectroscopic analysis of organosilanes. Talanta 2021; 223:121781. [PMID: 33298286 DOI: 10.1016/j.talanta.2020.121781] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 10/12/2020] [Accepted: 10/13/2020] [Indexed: 01/09/2023]
Abstract
Organosilanes are used in a broad range of industrial, cosmetic, and personal care products. They serve as bridges between inorganic or organic substrates and organic/polymeric matrices. They are also versatile intermediates and can be used for a variety of synthetic applications. They do not exist naturally and have to be synthesized. Evaluation of intermediates and products resulting from the synthesis processes of organosilanes can be challenging. In this study, gas chromatography with vacuum ultraviolet spectroscopic detection (VUV) was used to analyze Si-containing compounds that are commercially available or were synthetically prepared. VUV measures full scan absorption in the range of 120-240 nm, a region that provides unique absorption signatures for chemical compounds. VUV absorption spectra of organosilanes showed rich and featured characteristics in this wavelength range. Theoretical computations of VUV absorption spectra based on time-dependent density functional theory were also explored as a complementary tool for identification. In addition, the synthesis process of isomeric benzodioxasiline compounds (ortho-, meta-, and para-) was monitored by GC-VUV. It was demonstrated that GC-VUV can be used for easy and rapid differentiation of organosilanes, including structural isomers.
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Affiliation(s)
- Changling Qiu
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, TX, 76019, United States
| | - Parham Asgari
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, TX, 76019, United States
| | - X James Mao
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, TX, 76019, United States
| | - Junha Jeon
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, TX, 76019, United States
| | - Kevin A Schug
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, TX, 76019, United States.
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124
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Quinlivan PJ, Loo A, Shlian DG, Martinez J, Parkin G. N-Heterocyclic Carbene Complexes of Nickel, Palladium, and Iridium Derived from Nitron: Synthesis, Structures, and Catalytic Properties. Organometallics 2021. [DOI: 10.1021/acs.organomet.0c00679] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Patrick J. Quinlivan
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Aaron Loo
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Daniel G. Shlian
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Joan Martinez
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Gerard Parkin
- Department of Chemistry, Columbia University, New York, New York 10027, United States
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125
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Wang D, Chen X, Wong JJ, Jin L, Li M, Zhao Y, Houk KN, Shi Z. Phosphorus(III)-assisted regioselective C-H silylation of heteroarenes. Nat Commun 2021; 12:524. [PMID: 33483484 PMCID: PMC7822902 DOI: 10.1038/s41467-020-20531-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Accepted: 11/24/2020] [Indexed: 01/19/2023] Open
Abstract
Heteroarenes containing carbon-silicon (C-Si) bonds are important building blocks that play an important role in the construction of natural products, pharmaceuticals, and organic materials. In this context, the C-H silylation of heteroarenes is a topic of intense interest. Indole C-H silylation can preferentially occur at the nucleophilic C3 and C2 position (pyrrole core), while accessing the C4-C7 positions (benzene core) of the indole remains highly challenging. Here, we show a general strategy for the regioselective C7-H silylation of indole derivatives. Mainly, the regioselectivity is determined by strong coordination of the palladium catalyst with phosphorus (III) directing group. Using this expedient synthetic strategy, the diverse C7-silylated indoles are synthesized effectively which exhibits the broad functional group compatibility. Moreover, this protocol also been extended to other heteroarenes such as carbazoles. The obtained silylated indoles have been employed in various transformations to enable the corresponding differently functionalized indole derivatives. Significantly, a cyclopalladated intermediate is successfully synthesized to test the hypothesis about the P(III)-directed C-H metalation event. A series of mechanistic experiments and density functional theory (M06-2X) calculations has shown the preferred pathway of this directed C-H silylation process.
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Affiliation(s)
- Dingyi Wang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Xiangyang Chen
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, USA
| | - Jonathan J Wong
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, USA
| | - Liqun Jin
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, China
| | - Mingjie Li
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Yue Zhao
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - K N Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, USA.
| | - Zhuangzhi Shi
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China.
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126
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Zhou DY, Miura-Akagi PM, McCarty SM, Guiles CH, O'Donnell TJ, Yoshida WY, Krause CE, Rheingold AL, Hughes RP, Cain MF. P-Alkynyl functionalized benzazaphospholes as transmetalating agents. Dalton Trans 2021; 50:599-611. [PMID: 33403375 DOI: 10.1039/d0dt01367f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Exposure of 10π-electron benzazaphosphole 1 to HCl, followed by nucleophilic substitution with the Grignard reagent BrMgCCPh afforded alkynyl functionalized 3 featuring an exocyclic -C[triple bond, length as m-dash]C-Ph group with an elongated P-C bond (1.7932(19) Å). Stoichiometric experiments revealed that treatment of trans-Pd(PEt3)2(Ar)(i) (Ar = p-Me (C) or p-F (D)) with 3 generated trans-Pd(PEt3)2(Ar)(CCPh) (Ar = p-Me (E) or p-F (F)), 5, which is the result of ligand exchange between P-I byproduct 4 and C/D, and the reductively eliminated product (Ar-C[triple bond, length as m-dash]C-Ph). Cyclic voltammetry studies showed and independent investigations confirmed 4 is also susceptible to redox processes including bimetallic oxidative addition to Pd(0) to give Pd(i) dimer 6-Pd2-(P(t-Bu)3)2 and reduction to diphosphine 7. During catalysis, we hypothesized that this unwanted reactivity could be circumvented by employing a source of fluoride as an additive. This was demonstrated by conducting a Sonogashira-type reaction between 1-iodotoluene and 3 in the presence of 10 mol% Na2PdCl4, 20 mol% P(t-Bu)Cy2, and 5 equiv. of tetramethylammonium fluoride (TMAF), resulting in turnover and the isolation of Ph-C[triple bond, length as m-dash]C-(o-Tol) as the major product.
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Affiliation(s)
- Daniel Y Zhou
- Department of Chemistry, University of Hawai'i at Mānoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, USA.
| | - Preston M Miura-Akagi
- Department of Chemistry, University of Hawai'i at Mānoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, USA.
| | - Sierra M McCarty
- Department of Chemistry, University of Hawai'i at Mānoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, USA.
| | - Celeste H Guiles
- Department of Chemistry, University of Hawai'i at Mānoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, USA.
| | - Timothy J O'Donnell
- Department of Chemistry, University of Hawai'i at Mānoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, USA.
| | - Wesley Y Yoshida
- Department of Chemistry, University of Hawai'i at Mānoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, USA.
| | - Colleen E Krause
- Department of Chemistry, University of Hartford, 200 Bloomfield Avenue, West Hartford, Connecticut 06117, USA
| | - Arnold L Rheingold
- Department of Chemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA
| | - Russell P Hughes
- 6128 Burke Laboratory, Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755, USA
| | - Matthew F Cain
- Department of Chemistry, University of Hawai'i at Mānoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, USA.
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127
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Li X, Sun K, Shen W, Zhang Y, Lu MZ, Luo X, Luo H. Rhodium(III)-Catalyzed Direct C-H Arylation of Various Acyclic Enamides with Arylsilanes. Org Lett 2021; 23:31-36. [PMID: 33337165 DOI: 10.1021/acs.orglett.0c03578] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The stereoselective β-C(sp2)-H arylation of various acyclic enamides with arylsilanes via Rh(III)-catalyzed cross-coupling reaction was illustrated. The methodology was characterized by extraordinary efficacy and stereoselectivity, a wide scope of substrates, good functional group tolerance, and the adoption of environmentally friendly arylsilanes. The utility of this present method was evidenced by the gram-scale synthesis and further elaboration of the product. In addition, Rh(III)-catalyzed C-H activation is considered to be the critical step in the reaction mechanism.
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Affiliation(s)
- Xiaolan Li
- Department of Chemistry & Chemical Engineering, Gannan Normal University, Ganzhou 341000, China
| | - Kai Sun
- Department of Chemistry & Chemical Engineering, Gannan Normal University, Ganzhou 341000, China
| | - Wenjuan Shen
- Department of Chemistry & Chemical Engineering, Gannan Normal University, Ganzhou 341000, China
| | - Yong Zhang
- Department of Chemistry & Chemical Engineering, Gannan Normal University, Ganzhou 341000, China
| | - Ming-Zhu Lu
- Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, China
| | - Xuzhong Luo
- Department of Chemistry & Chemical Engineering, Gannan Normal University, Ganzhou 341000, China
| | - Haiqing Luo
- Department of Chemistry & Chemical Engineering, Gannan Normal University, Ganzhou 341000, China
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128
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Balakrishnan MH, Kanagaraj M, Sankar V, Ravva MK, Mannathan S. Synthesis of ortho-arylated and alkenylated benzamides by palladium-catalyzed denitrogenative cross-coupling reactions of 1,2,3-benzotriazin-4(3 H)-ones with organoboronic acids. NEW J CHEM 2021. [DOI: 10.1039/d1nj03706d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
An efficient palladium-catalyzed denitrogenative cross-coupling reaction of 1,2,3-benzotriazin-4(3H)-ones with organoboronic acids is described. The reaction affords various ortho-aryl and alkenylated benzamides in good to high yields.
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Affiliation(s)
- Madasamy Hari Balakrishnan
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Chennai, 603203, India
| | - Madasamy Kanagaraj
- Department of Chemistry SRM University, AP, Andhra Pradesh 522502, India
| | - Velayudham Sankar
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Chennai, 603203, India
| | - Mahesh Kumar Ravva
- Department of Chemistry SRM University, AP, Andhra Pradesh 522502, India
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129
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Chen Y, Zhang X, Liu F, He G, Zhang J, Houk K, Smith AB, Liang Y. The role of CuI in the siloxane-mediated Pd-catalyzed cross-coupling reactions of aryl iodides with aryl lithium reagents. CHINESE CHEM LETT 2021; 32:441-444. [PMID: 33994753 PMCID: PMC8115222 DOI: 10.1016/j.cclet.2020.05.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Experiments indicate that a catalytic amount of CuI plays an important role in the siloxane-mediated Pd-catalyzed cross-coupling reactions with the direct use of organolithium reagents. Addition of organolithium to the siloxane transfer agent generates an organosilicon intermediate. DFT calculations indicate that CuI initially accelerates the Si-Pd(II) transmetalation of the organosilicon intermediate by the formation of CuI2 -. Subsequently, CuI2 - works as a shuttle between the Si-Cu(I) and Cu(I)-Pd(II) transmetalation processes.
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Affiliation(s)
- Yu Chen
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Xiao Zhang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Fang Liu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Gucheng He
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Ju Zhang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - K.N. Houk
- Department of Chemistry and Biochemistry, University of California, CA 90095, United States
| | - Amos B. Smith
- Department of Chemistry, University of Pennsylvania, PA 19104, United States
| | - Yong Liang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
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130
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Zhang Y, Guo J, Huang J, Fu Z. N-Heterocyclic Carbene-Catalyzed [4+2] Annulation of Acetates and β-Silyl Enones: Highly Enantioselective Synthesis of β-Silyl δ-Lactones. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202105002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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131
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Matsumoto T, Hagiyama H, Kuribayashi K, Hioki K, Fujita H, Ochiai M, Kunishima M. A versatile iodo(III)etherification of terminal ethynylsilanes using BF 3-O iPr 2 and alkyl benzyl ethers. Org Biomol Chem 2021; 19:3825-3828. [PMID: 33949597 DOI: 10.1039/d1ob00479d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A series of (E)-α-silyl-β-alkoxyvinyl-λ3-iodanes was synthesized from iodosylbenzene, BF3-ether complexes, and terminal ethynylsilanes. The combined use of BF3-OiPr2 and benzyl ethers of primary alcohols (ROBn) allows the chemoselective transfer of primary alkoxy groups (RO) onto the β-position of the terminal ethynylsilanes.
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Affiliation(s)
- Takuya Matsumoto
- Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical, and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan.
| | - Hiroshi Hagiyama
- Faculty of Pharmaceutical Sciences, Kobe Gakuin University, 1-1-3 Minatojima, Chuo-ku, Kobe 650-8586, Japan
| | - Kanetsugu Kuribayashi
- Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical, and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan.
| | - Kazuhito Hioki
- Faculty of Pharmaceutical Sciences, Kobe Gakuin University, 1-1-3 Minatojima, Chuo-ku, Kobe 650-8586, Japan
| | - Hikaru Fujita
- Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical, and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan.
| | - Masahito Ochiai
- Graduate School of Pharmaceutical Sciences, Tokushima University, 1-78 Shomachi, Tokushima 770-8505, Japan
| | - Munetaka Kunishima
- Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical, and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan.
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132
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Xie R, Zhu J, Huang Y. Cu-Catalyzed highly selective silylation and borylation of alkenylsulfonium salts. Org Chem Front 2021. [DOI: 10.1039/d1qo00922b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A Cu-catalyzed highly selective silylation and borylation of alkenylsulfonium salts under mild conditions is reported providing various alkenylsilanes and alkenylboranes.
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Affiliation(s)
- Rong Xie
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Jie Zhu
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Yinhua Huang
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
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133
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Mingo MM, Rodríguez N, Arrayás RG, Carretero JC. Remote C(sp 3)–H functionalization via catalytic cyclometallation: beyond five-membered ring metallacycle intermediates. Org Chem Front 2021. [DOI: 10.1039/d1qo00389e] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Despite impressive recent momentum gained in C(sp3)–H activation, achieving high regioselectivity in molecules containing different C–H bonds with similar high energy without abusing tailored substitution remains as one of the biggest challenges.
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Affiliation(s)
- Mario Martínez Mingo
- Department of Organic Chemistry, Universidad Autónoma de Madrid, c/Fco. Tomás y Valiente 7, Cantoblanco 28049, Madrid, Spain
| | - Nuria Rodríguez
- Department of Organic Chemistry, Universidad Autónoma de Madrid, c/Fco. Tomás y Valiente 7, Cantoblanco 28049, Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid (UAM), Spain
| | - Ramón Gómez Arrayás
- Department of Organic Chemistry, Universidad Autónoma de Madrid, c/Fco. Tomás y Valiente 7, Cantoblanco 28049, Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid (UAM), Spain
| | - Juan C. Carretero
- Department of Organic Chemistry, Universidad Autónoma de Madrid, c/Fco. Tomás y Valiente 7, Cantoblanco 28049, Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid (UAM), Spain
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134
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Zhang Y, Huang X, Guo J, Wei C, Gong M, Fu Z. Carbene-Catalyzed Enantioselective Synthesis of γ-Keto-β-silyl Esters and Amides. Org Lett 2020; 22:9545-9550. [PMID: 33300797 DOI: 10.1021/acs.orglett.0c03589] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A variety of γ-keto-β-silyl esters and amides, most with extremely high enantioselectivities, were efficiently prepared via a carbene-catalyzed formal [4 + 2] annulation followed by ring opening with nucleophiles. The resulting compounds from this one-pot strategy can be easily converted into enantioenriched β,σ-dihydroxyl esters.
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Affiliation(s)
- Yuxia Zhang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China
| | - Xuan Huang
- International Joint Research Center for Molecular Science, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518060, P. R. China
| | - Jingcheng Guo
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China
| | - Chenlong Wei
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China
| | - Minghua Gong
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China
| | - Zhenqian Fu
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China
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135
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Duan J, Wang K, Xu GL, Kang S, Qi L, Liu XY, Shu XZ. Cross-Electrophile C(sp 2 )-Si Coupling of Vinyl Chlorosilanes. Angew Chem Int Ed Engl 2020; 59:23083-23088. [PMID: 32902100 DOI: 10.1002/anie.202010737] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 09/08/2020] [Indexed: 11/10/2022]
Abstract
The cross-electrophile coupling has become a powerful tool for C-C bond formation, but its potential for forging the C-Si bond remains unexplored. Here we report a cross-electrophile Csp2 -Si coupling reaction of vinyl/aryl electrophiles with vinyl chlorosilanes. This new protocol offers an approach for facile and precise synthesis of organosilanes with high molecular diversity and complexity from readily available materials. The reaction proceeds under mild and non-basic conditions, demonstrating a high step economy, broad substrate scope, wide functionality tolerance, and easy scalability. The synthetic utility of the method is shown by its efficient accessing of silicon bioisosteres, the design of new BCB-monomers, and studies on the Hiyama cross-coupling of vinylsilane products.
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Affiliation(s)
- Jicheng Duan
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou, 730000, China
| | - Ke Wang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou, 730000, China
| | - Guang-Li Xu
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou, 730000, China
| | - Shaolin Kang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou, 730000, China
| | - Liangliang Qi
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou, 730000, China
| | - Xue-Yuan Liu
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou, 730000, China
| | - Xing-Zhong Shu
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou, 730000, China
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136
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Duan J, Wang K, Xu G, Kang S, Qi L, Liu X, Shu X. Cross‐Electrophile C(sp
2
)−Si Coupling of Vinyl Chlorosilanes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010737] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Jicheng Duan
- State Key Laboratory of Applied Organic Chemistry (SKLAOC) College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 China
| | - Ke Wang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC) College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 China
| | - Guang‐Li Xu
- State Key Laboratory of Applied Organic Chemistry (SKLAOC) College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 China
| | - Shaolin Kang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC) College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 China
| | - Liangliang Qi
- State Key Laboratory of Applied Organic Chemistry (SKLAOC) College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 China
| | - Xue‐Yuan Liu
- State Key Laboratory of Applied Organic Chemistry (SKLAOC) College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 China
| | - Xing‐Zhong Shu
- State Key Laboratory of Applied Organic Chemistry (SKLAOC) College of Chemistry and Chemical Engineering Lanzhou University 222 South Tianshui Road Lanzhou 730000 China
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137
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Lu SJ, Wang MY, Wu LS, Wu YF. Modification of geometrical and electronic structures of anionic and neutral silicon clusters by double-doped tantalum atoms. Mol Phys 2020. [DOI: 10.1080/00268976.2020.1770883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Sheng-Jie Lu
- Department of Chemistry and Chemical Engineering, Heze University, Heze, People’s Republic of China
- Beijing National Laboratory for Molecular Sciences, Beijing, People’s Republic of China
| | - Meng-Yuan Wang
- Department of Chemistry and Chemical Engineering, Heze University, Heze, People’s Republic of China
| | - Li-Shun Wu
- Department of Chemistry and Chemical Engineering, Heze University, Heze, People’s Republic of China
| | - Yi-Fang Wu
- Department of Chemistry and Chemical Engineering, Heze University, Heze, People’s Republic of China
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138
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Lu XY, Liu CC, Jiang RC, Yan LY, Liu QL, Wang QQ, Li JM. Synthesis of trisubstituted alkenes by Ni-catalyzed hydroalkylation of internal alkynes with cycloketone oxime esters. Chem Commun (Camb) 2020; 56:14191-14194. [PMID: 33107875 DOI: 10.1039/d0cc06517j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
A method for Ni-catalyzed hydroalkylation of internal alkynes with cycloketone oxime esters was developed. The reaction has a broad substrate scope. This hydroalkylation shows excellent regio- and stereo-selectivity. This method enables readily available starting materials to be used to access a range of cyano-substituted single-configuration trisubstituted alkenes. These are valuable feedstock chemicals and are widely used in synthetic and medicinal chemistry.
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Affiliation(s)
- Xiao-Yu Lu
- School of Materials and Chemical Engineering, ChuZhou University, Chu Zhou, 239000, China.
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139
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Prasad Reddy KSSV, Deshpande PA. On the ligand-free palladium cluster catalysed Suzuki-Miyaura reaction. Phys Chem Chem Phys 2020; 22:25021-25031. [PMID: 33112307 DOI: 10.1039/d0cp04286b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
C-C cross coupling reactions have been widely used for developing synthesis protocols for pharmaceuticals and agricultural products in the past few decades. Of all the reported C-C cross coupling reactions, the Suzuki-Miyaura reaction is preferred because of its mild reaction conditions, the commercial availability of associated reagents and the ease of removal of boron containing by-products. Recently, Corma and co-workers [Leyva-Perez et al., Angew. Chem., 2013, 125, 11768] reported water-stabilized three- and four-atom Pd clusters as highly active catalytic species for C-C coupling reactions. The present work focuses on developing detailed mechanistic insights into the Suzuki-Miyaura reaction with Pd3 and Pd4 clusters utilizing density functional theory calculations. The role of the base in the reaction was analysed in this study, which was found to lower the activation barriers of transmetalation over both Pd3 and Pd4. Free energy landscapes for Suzuki-Miyaura coupling of bromobenzene and phenylboronic acid over Pd3 and Pd4 clusters were developed. The highest free energy barriers of 34.7 and 30.4 kcal mol-1 were observed for the oxidative addition over Pd3 and Pd4, respectively, indicating the oxidative addition as the rate limiting step. Detailed energetics conclusively proved the active nature of small-atom Pd clusters for catalyzing the Suzuki-Miyaura reaction.
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Affiliation(s)
- K S S V Prasad Reddy
- Quantum and Molecular Engineering Laboratory, Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
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140
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Tani T, Takahashi N, Sawatsugawa Y, Osano M, Tsuchimoto T. Stepwise Suzuki−Miyaura Cross‐Coupling of Triborylalkenes Derived from Alkynyl−B(dan)s: Regioselective and Flexible Synthesis of Tetrasubstituted Alkenes. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202001116] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Tomohiro Tani
- Department of Applied Chemistry School of Science and Technology Meiji University, 1-1-1 Higashimita, Tama-ku Kawasaki 214-8571 Japan
| | - Naomi Takahashi
- Department of Applied Chemistry School of Science and Technology Meiji University, 1-1-1 Higashimita, Tama-ku Kawasaki 214-8571 Japan
| | - Yuuki Sawatsugawa
- Department of Applied Chemistry School of Science and Technology Meiji University, 1-1-1 Higashimita, Tama-ku Kawasaki 214-8571 Japan
| | - Mana Osano
- Department of Applied Chemistry School of Science and Technology Meiji University, 1-1-1 Higashimita, Tama-ku Kawasaki 214-8571 Japan
| | - Teruhisa Tsuchimoto
- Department of Applied Chemistry School of Science and Technology Meiji University, 1-1-1 Higashimita, Tama-ku Kawasaki 214-8571 Japan
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141
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Wu LJ, Teng F, Lv GF, Li JH. Relay Palladium/Copper Catalysis Enabled Silylative [5 + 1] Benzannulation Using Terminal Alkynes as One-Carbon Units. Org Lett 2020; 22:8544-8549. [PMID: 33075230 DOI: 10.1021/acs.orglett.0c03144] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Using terminal alkyne as a nontraditional one-carbon (C1) unit and silylborane as an external silicon pronucleophile, a relay palladium/copper-catalyzed silylative [5 + 1] benzannulation of 3-acetoxy-1,4-enynes for producing polysubstituted arylsilanes, especially including bioactive motif-based analogues, in a single reaction step through benzene ring skeleton assembly and silyl intermolecular incorporation cascades is developed. Mechanistic studies show that this reaction allows the terminal sp-hybridized carbon atom in terminal alkynes as a C1 unit via cleavage of two π-bonds and one C(sp)-H bond.
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Affiliation(s)
- Li-Jun Wu
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Fan Teng
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Gui-Fen Lv
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Jin-Heng Li
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China.,State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China.,Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research (Ministry of Education), Hunan Normal University, Changsha 410081, China.,State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
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142
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Lu MZ, Luo H, Hu Z, Shao C, Kan Y, Loh TP. Directed Palladium(II)-Catalyzed Intermolecular Anti-Markovnikov Hydroarylation of Unactivated Alkenes with (Hetero)arylsilanes. Org Lett 2020; 22:9022-9028. [PMID: 33151076 DOI: 10.1021/acs.orglett.0c03416] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We describe herein a regioselective palladium(II)-catalyzed intermolecular hydroarylation of unactivated aliphatic alkenes with electronically and sterically diverse (hetero)arylsilanes under redox-neutral conditions. A removable bidentate 8-aminoquinoline auxiliary was readily employed to dictate the regioselectivity, prevent β-hydride elimination, and facilitate protodepalladation. This silicon-based protocol features a broad substrate scope with excellent functional group compatibility and enables an expeditious route to a variety of γ-aryl butyric acid derivatives in good yields with exclusive anti-Markovnikov selectivity.
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Affiliation(s)
- Ming-Zhu Lu
- Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, China
| | - Haiqing Luo
- Department of Chemistry & Chemical Engineering, Gannan Normal University, Ganzhou 341000, China
| | - Zhengsong Hu
- Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, China
| | - Changdong Shao
- Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, China
| | - Yuhe Kan
- Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223300, China
| | - Teck-Peng Loh
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
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143
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Milenin SA, Ardabevskaia SN, Novikov RA, Solyev PN, Tkachev YV, Volodin AD, Korlyukov AA, Muzafarov AM. Construction of siloxane structures with P-Tolyl substituents at the silicon atom. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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144
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Kandathil V, Siddiqa A, Patra A, Kulkarni B, Kempasiddaiah M, Sasidhar B, Patil SA, Rout CS, Patil SA. NHC‐Pd complex heterogenized on graphene oxide for cross‐coupling reactions and supercapacitor applications. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5924] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Vishal Kandathil
- Centre for Nano and Material Sciences Jain University, Jain Global Campus, Kanakapura, Ramanagaram Bangalore 562112 India
| | - Aisha Siddiqa
- Centre for Nano and Material Sciences Jain University, Jain Global Campus, Kanakapura, Ramanagaram Bangalore 562112 India
| | - Abhinandan Patra
- Centre for Nano and Material Sciences Jain University, Jain Global Campus, Kanakapura, Ramanagaram Bangalore 562112 India
| | - Bhakti Kulkarni
- Centre for Nano and Material Sciences Jain University, Jain Global Campus, Kanakapura, Ramanagaram Bangalore 562112 India
| | - Manjunatha Kempasiddaiah
- Centre for Nano and Material Sciences Jain University, Jain Global Campus, Kanakapura, Ramanagaram Bangalore 562112 India
| | - B.S. Sasidhar
- Organic Chemistry Section, Chemical Sciences & Technology Division National Institute for Interdisciplinary Science and Technology Thiruvananthapuram Kerala ‐695019 India
| | - Shivaputra A. Patil
- Pharmaceutical Sciences Department College of Pharmacy, Rosalind Franklin University of Medicine and Science 3333 Green Bay Road, North Chicago IL 60064 USA
| | - Chandra Sekhar Rout
- Centre for Nano and Material Sciences Jain University, Jain Global Campus, Kanakapura, Ramanagaram Bangalore 562112 India
| | - Siddappa A. Patil
- Centre for Nano and Material Sciences Jain University, Jain Global Campus, Kanakapura, Ramanagaram Bangalore 562112 India
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145
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Abstract
The synthesis of substituted indoles has received great attention in the field of organic synthesis methodology. C–H activation makes it possible to obtain a variety of designed indole derivatives in mild conditions. Ruthenium catalyst, as one of the most significant transition-metal catalysts, has been contributing in the synthesis of indole scaffolds through C–H activation and C–H activation on indoles. Herein, we attempt to present an overview about the construction strategies of indole scaffold and site-specific modifications for indole scaffold via ruthenium-catalyzed C–H activations in recent years.
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146
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Rivas A, Areal A, Mora P, Álvarez R, de Lera AR. Synthesis of Symmetrical and Nonsymmetrical Polyenes by Iterative and Bidirectional Palladium-Catalyzed Cross-Coupling Reactions. Chemistry 2020; 26:13543-13567. [PMID: 32267574 DOI: 10.1002/chem.202000624] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 04/08/2020] [Indexed: 11/06/2022]
Abstract
Bifunctional unsaturated reagents designed to undergo palladium-catalyzed cross-coupling reactions with complementary polyenyl connective fragments are highly useful for the undoubtedly challenging synthesis of polyenes. The current toolkit of building blocks for the bidirectional formation of Csp2 -Csp2 single bonds of polyenes includes homo-bisfunctionalized reagents with equal or unequal reactivity (due to steric and/or electronic factors), and hetero-bisfunctionalized counterparts containing either two different nucleophiles, two electrophiles or one of these functionalities and a latent nucleophile that can be unmasked when desired. The combination of these bifunctional linchpin reagents using tactics that modulate the reactivity of each terminus in order to achieve the required connection have streamlined the synthesis of polyenes of great complexity using (iterative) cross-coupling methods for Csp2 -Csp2 bond formation. Reaction conditions for the Pd-catalyzed cross-coupling reactions are mild and functional-group-tolerant, and therefore these protocols allow to construct the polyene structures using shorter unsaturated reactants with the desired geometries, since in general the products preserve the stereochemical information of the connected cross-coupling partners.
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Affiliation(s)
- Aurea Rivas
- Departamento de Química Orgánica, Facultade de Química, CINBIO and IIS Galicia Sur, Universidade de Vigo, 36310, Vigo, Spain
| | - Andrea Areal
- Departamento de Química Orgánica, Facultade de Química, CINBIO and IIS Galicia Sur, Universidade de Vigo, 36310, Vigo, Spain
| | - Paula Mora
- Departamento de Química Orgánica, Facultade de Química, CINBIO and IIS Galicia Sur, Universidade de Vigo, 36310, Vigo, Spain
| | - Rosana Álvarez
- Departamento de Química Orgánica, Facultade de Química, CINBIO and IIS Galicia Sur, Universidade de Vigo, 36310, Vigo, Spain
| | - Angel R de Lera
- Departamento de Química Orgánica, Facultade de Química, CINBIO and IIS Galicia Sur, Universidade de Vigo, 36310, Vigo, Spain
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147
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Rhodium Nanoparticles Stabilized by PEG-Tagged Imidazolium Salts as Recyclable Catalysts for the Hydrosilylation of Internal Alkynes and the Reduction of Nitroarenes. Catalysts 2020. [DOI: 10.3390/catal10101195] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
PEGylated imidazolium (bromide and tetrafluoroborate) and tris-imidazolium (bromide) salts containing triazole linkers have been used as stabilizers for the preparation of water-soluble rhodium(0) nanoparticles by reduction of rhodium trichloride with sodium borohydride in water at room temperature. The nanomaterials have been characterized (Transmission Electron Microscopy, Electron Diffraction, X-ray Photoelectron Spectroscopy, Inductively Coupled Plasma-Optical Emission Spectroscopy). They proved to be efficient and recyclable catalysts for the stereoselective hydrosilylation of internal alkynes, in the presence or absence of solvent, and in the reduction of nitroarenes to anilines with ammonia-borane as hydrogen donor in aqueous medium (1:4 tetrahydrofuran/water).
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148
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Jiang W, Zhang Y, Su Y, Bao X, Fu Y, Huo C. Oxidative Dehydrogenative
Silylation‐Alkenation
Reaction of Alkyl Aromatics with Silanes. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.202000118] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Wei Jiang
- Gansu International Scientific and Technological Cooperation Base of Water‐Retention Chemical Functional Materials; College of Chemistry and Chemical Engineering, Northwest Normal University Lanzhou Gansu 730070 China
| | - Yongxin Zhang
- Gansu International Scientific and Technological Cooperation Base of Water‐Retention Chemical Functional Materials; College of Chemistry and Chemical Engineering, Northwest Normal University Lanzhou Gansu 730070 China
| | - Yingpeng Su
- Gansu International Scientific and Technological Cooperation Base of Water‐Retention Chemical Functional Materials; College of Chemistry and Chemical Engineering, Northwest Normal University Lanzhou Gansu 730070 China
| | - Xiazhen Bao
- Gansu International Scientific and Technological Cooperation Base of Water‐Retention Chemical Functional Materials; College of Chemistry and Chemical Engineering, Northwest Normal University Lanzhou Gansu 730070 China
| | - Ying Fu
- Gansu International Scientific and Technological Cooperation Base of Water‐Retention Chemical Functional Materials; College of Chemistry and Chemical Engineering, Northwest Normal University Lanzhou Gansu 730070 China
| | - Congde Huo
- Gansu International Scientific and Technological Cooperation Base of Water‐Retention Chemical Functional Materials; College of Chemistry and Chemical Engineering, Northwest Normal University Lanzhou Gansu 730070 China
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149
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Hubert P, Seibel E, Beemelmanns C, Campagne J, Figueiredo RM. Stereoselective Construction of (
E,Z
)‐1,3‐Dienes and Its Application in Natural Product Synthesis. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000730] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Pierre Hubert
- ICGM Univ Montpellier, CNRS, ENSCM Montpellier France
| | - Elena Seibel
- Hans-Knöll-Institute (HKI) Beutenbergstrasse 11a 07745 Jena Germany
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150
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Sarkar W, Bhowmik A, Das S, Sulekha AB, Mishra A, Deb I. Iridium-catalyzed direct C-H arylation of cyclic N-sulfonyl ketimines with arylsiloxanes at ambient temperature. Org Biomol Chem 2020; 18:7074-7078. [PMID: 32691811 DOI: 10.1039/d0ob01212b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
An iridium-catalyzed ortho-selective C-H arylation of cyclic N-sulfonyl ketimines has been achieved with environmentally benign aryl siloxanes. The reaction is highly efficient and proceeds at ambient temperature which is the key feature of the methodology considering the weak coordination nature of the substrate as well as the sluggish reactivity of siloxanes. A wide array of pharmaceutically relevant novel biaryls has been synthesized under operationally simple conditions.
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Affiliation(s)
- Writhabrata Sarkar
- Organic & Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4-Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India.
| | - Arup Bhowmik
- Organic & Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4-Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India.
| | - Sumit Das
- Organic & Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4-Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India. and Academy of Scientific and Innovative Research (AcSIR), India
| | - Aiswarya Balaram Sulekha
- Organic & Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4-Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India.
| | - Aniket Mishra
- Organic & Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4-Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India.
| | - Indubhusan Deb
- Organic & Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4-Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India.
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